div {
  width: 200px;
  height: 200px;
  background-color: antiquewhite;
  font-size: 30px;
  text-align: center;
  line-height: 200px;
}

.active {
  background-color: blue;
}

.lyw {
  width: 200px;
  height: 100px;
  background-color: gray;
  line-height: 100px;
  text-align: center;
}

.yellow {
  width: 200px;
  height: 100px;
  background-color: yellow;
  font-size: 30px;
  text-align: center;
  line-height: 100px;
}

* {
  margin: 0;
  padding: 0;
}

.mgh {
  width: 200px;
  height: 100px;
  text-align: center;
  line-height: 100px;
  font-size: 20px;
  background-color: pink;
}

.yellow {
  width: 200px;
  height: 100px;
  text-align: center;
  line-height: 100px;
  font-size: 20px;
  background-color: pink;
}

.lfy {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  font-size: 20px;
  background-color: skyblue;
  line-height: 300px;
  text-align: center;
}